Homematic IP 153489A0 smart home transmitter Wireless Wall-mounted RF Wireless

The Homematic IP 153489A0 smart home transmitter is a compact, battery-powered wireless wall-mounted RF module designed to convert conventional floating push-buttons, switches or contacts into components of a Homematic IP smart home system. With a slim housing sized for flush-mounted boxes, the device can be placed behind existing switch elements and does not require a mains connection thanks to its durable lithium battery. It supports integration into Homematic IP or compatible third-party solutions for controlling lights, shutters and other connected loads via RF wireless communication.

Advantages

The transmitter enables retrofitting of existing installations without replacing switch covers or wiring changes, preserving current switch systems while adding wireless control capabilities. Compact dimensions allow installation in standard flush-mounted boxes behind buttons and switches. Battery operation simplifies installation and maintenance, and compatibility with Homematic IP Access Point, CCU2/CCU3 or selected partner solutions ensures flexible integration into cloud-based or local smart home setups.

Suitable for

• Retrofitting conventional floating push-buttons for wireless control
• Adding smart control to existing light or shutter switches without rewiring
• Integrating mechanical contacts into Homematic IP or partner systems
• Installing in flush-mounted boxes behind existing switch elements

Key specifications

• Form factor: wall-mounted transmitter for installation in flush-mounted boxes
• Connectivity: RF wireless interface compatible with Homematic IP ecosystem
• Power supply: built-in lithium battery (durable, no mains connection required)
• Dimensions: width 41 mm, depth 35 mm, height 12 mm
• Function: converts floating push-buttons, switches or contacts into wireless inputs
• Integration options: cloud-based access point via smartphone app or local central unit

How to use

Install the transmitter in the flush-mounted box behind the existing push-button or switch and connect the switch contacts to the transmitter according to the installation instructions. Pair the device with a Homematic IP Access Point using the free smartphone app, or add it to a CCU2/CCU3 central control unit or a supported third-party partner solution. After successful integration, configure the desired functions, such as controlling lights or shutters, through the chosen control interface.

Recommendations

Place the device inside a flush-mounted box directly behind the existing switch element to ensure reliable contact wiring and RF transmission. Use the Homematic IP app or the local WebUI to assign logical actions and test operation after installation. Replace the lithium battery according to the manufacturer’s guidance and avoid installing the transmitter in locations with strong RF interference.